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Total

DNS

Email

Security

100

Network

100

Availability

Domainirs.gov

IPv42

IPv62

MX records3

StatusActive

Domain technical report

Internal Revenue Service | An official website of the United States government

irs.gov

Pay your taxes. Get your refund status. Find IRS forms and answers to tax questions. We help you understand and meet your federal tax responsibilities.

Generated: 2026-08-08T18:15:09-05:00 · Cached result

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IPv42

IPv62

MX3

NS2

DiagnosticsMain findings and recommendations

✓

IPv4 (A)30 / 30 pts · Dns

2 IPv4 address(es) detected.

✓

IPv6 (AAAA)10 / 10 pts · Dns

2 IPv6 address(es) detected.

✓

Name server redundancy20 / 20 pts · Dns

2 NS record(s); 2 or more required.

✓

SOA record10 / 10 pts · Dns

Authoritative zone record.

✓

DNSSEC chain15 / 15 pts · Dns

DS and DNSKEY detected.

CAA policy0 / 5 pts · Dns

Certificate authority restriction.

✓

DNS propagation10 / 10 pts · Dns

Agreement between public resolvers.

✓

MX records20 / 20 pts · Mail

3 MX record(s).

✓

SPF25 / 25 pts · Mail

SPF policy published.

✓

DMARC25 / 25 pts · Mail

DMARC policy published.

DKIM0 / 20 pts · Mail

No tested DKIM selector responded.

MTA-STS0 / 5 pts · Mail

Mail transport policy.

TLS-RPT0 / 5 pts · Mail

TLS reporting policy.

✓

Valid TLS certificate55 / 55 pts · Security

10 day(s) remaining.

Certificate lifetime2 / 10 pts · Security

Full points require at least 30 days remaining.

HTTP security headers12 / 35 pts · Security

3 of 9 evaluated headers detected.

✓

PTR reverse DNS30 / 30 pts · Network

PTR: irs.gov

✓

IPv4 diversity35 / 35 pts · Network

Two or more IPv4 addresses receive full points.

✓

IPv6 connectivity35 / 35 pts · Network

AAAA availability.

✓

DNS resolution40 / 40 pts · Availability

At least one address family must resolve.

✓

HTTP response40 / 40 pts · Availability

HTTP/2 200

✓

HTTPS final URL20 / 20 pts · Availability

Final URL uses HTTPS.

DNS and emailPublished records and email configuration

A

2 record(s)

152.216.7.110
152.216.11.110

AAAA

2 record(s)

2610:30:4000:402::110
2610:30:2000:402::110

CNAME

0 record(s)

—

Not configured

MX

3 record(s)

10 emgc.irs.gov.
10 emge.irs.gov.
20 emgw.irs.gov.

TXT

2 record(s)

"v=spf1 ip4:152.216.0.0/20 ip6:2610:30::/32 -all"
"google-site-verification=GsJzgbUY39iE6wPNlPdZCPGWwyhYpWwxpVxaU8g-Aa4"

NS

2 record(s)

ns0022.secondary.cloudflare.com.
ns0227.secondary.cloudflare.com.

SOA

1 record(s)

ns1.irs.gov. it\.aciouns\.external\.dns\.admin.irs.gov. 2010093270 3600 1800 2419200 900

CAA

0 record(s)

—

Not configured

DS

1 record(s)

10226 8 2 C94F81E17566EBB0ACA0227E07297E9B3236B9DCAFC018BBE72CE0C9 229630BB

DNSKEY

2 record(s)

257 3 8 AwEAAdyBXX4YQk/F+GRZr0fnahrki3+8fXT4xgbeKjhBqtYm4YIaOCYV P2Ld0HOimw2oYC9Hm51w+EPxwVp3Y3Yvb3ldpLnxUmHhzh7cAwxeRbBE oj1s6vxdwhLFrbabhtkB+ZATbBLccRhJSa9hcgLJHMG+RQ4Q9pXzfJkt jS/vutdcXPma0zWUjMk/VEg9o9RQG1BNNYRFJVBWbi6eHbNQc16Skz53 jSiU4dSm5xFK71tAz6gB5YGwlSL/05moLUgTE9PkfZZFhRidK02TDOXo f/sxjSTafNXn44NjB4caZfkobDRQHRKlrQNd7MqGtEq5cWTQHJwOdjIE U7Vayefv4Z0=
256 3 8 AwEAAYz3gN/2WRLT4r374atite1706I7GKvb24ktWtiJKFOB8ObYGiV+ bKJR79svJ0l24JGJDXLo+aS5wdhNG3EWZ+IoJjMRvAMwh3ycpZ4ehy0b GrnpLmREXZ/c8O6v7Qw0P/TIOg1UWA2QUZHx1LrYQiKqjDPFzhnJWbDX VDTU2VTZO8gyZY0Wx7WNCVal8RZjYxJyk54mWLEWXnfjoxBOzi8UEIaF Ejbh0w/ZWhayeHg/HyZibJ9uhIXARUGKc5Y76Lc81qjlKHrMkM11ETzn 2pS0VztuXNbVqUfkoljhl+s6Nufm/RdaPm0Bg5PDs2Wv52c1aW0c8xJl z5YsEt6CvQs=

RRSIG

0 record(s)

—

Not configured

NSEC

1 record(s)

_akamai-domain-challenge.irs.gov. A NS SOA MX TXT AAAA RRSIG NSEC DNSKEY

NSEC3

0 record(s)

—

Not configured

SRV

0 record(s)

—

Not configured

NAPTR

0 record(s)

—

Not configured

TLSA

0 record(s)

—

Not configured

SSHFP

0 record(s)

—

Not configured

SPF

Configured

v=spf1 ip4:152.216.0.0/20 ip6:2610:30::/32 -all

DMARC

Configured

v=DMARC1; p=reject; rua=mailto:dmarc-agg-feed@ofdp.irs.gov,mailto:reports@dmarc.cyber.dhs.gov; ruf=mailto:dmarc-for-feed@ofdp.irs.gov; fo=1

DKIM

Not found

—

Not configured

Analyzed webpageMetadata and HTTP response

Title and description

Extracted

Title

Internal Revenue Service | An official website of the United States government

Description

Pay your taxes. Get your refund status. Find IRS forms and answers to tax questions. We help you understand and meet your federal tax responsibilities.

Final URL

https://www.irs.gov/

HTTP status

206

HTTP

Status

HTTP/2 200

Final URL

https://www.irs.gov/

Version

Server

BigIP

X-Powered-By

SSL and HTTP securityCertificate, protocol and security headers

SSL certificate

Available

Yes

Issuer

Entrust Limited

irs.gov

Valid from

2025-07-17T19:00:00-05:00

Valid until

2026-08-18T18:59:59-05:00

Days remaining

Protocol

TLSv1.2

Cipher

ECDHE-RSA-AES128-GCM-SHA256

Security headers

3 active

✓

HSTSImplemented

—

Content Security PolicyNot detected

✓

X-Content-Type-OptionsImplemented

✓

X-Frame-OptionsImplemented

—

Referrer PolicyNot detected

—

Permissions PolicyNot detected

—

Cross-Origin-Opener-PolicyNot detected

—

Cross-Origin-Embedder-PolicyNot detected

—

Cross-Origin-Resource-PolicyNot detected

DNS propagationComparison across public resolvers

Public resolver comparison

Consistent

✓

Consistent propagation

5 public resolvers queried.

ResolverServerResultLatency

Google

8.8.8.8

152.216.11.110, 152.216.7.110

53,56 ms

Cloudflare

1.1.1.1

152.216.11.110, 152.216.7.110

18,74 ms

Quad9

9.9.9.9

152.216.11.110, 152.216.7.110

24,61 ms

OpenDNS

208.67.222.222

152.216.11.110, 152.216.7.110

24,88 ms

AdGuard

94.140.14.14

152.216.11.110, 152.216.7.110

40,78 ms

IP, geolocation and ASNAssociated network information

152.216.7.110

No data

success

country

region

city

asn

organization

isp

152.216.11.110

No data

success

country

region

city

asn

organization

isp

Visitor information

Visitor

216.73.217.62

reverse

country

country_code

region

city

latitude

longitude

isp

organization

asn

timezone

browser

Other

language

user_agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

is_bot

Yes

cloudflare

SMTPEmail port connectivity

emgc.irs.gov

Port 25: Closed/unreachable - 3.4 ms - 
Port 465: Closed/unreachable - 29 ms - 
Port 587: Closed/unreachable - 27.1 ms -

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